Lotide

A mini clone of the Lodash library.

Purpose

BEWARE: This library was published for learning purposes. It is not intended for use in production-grade software.

This project was created and published by me as part of my learnings at Lighthouse Labs.

Usage

Install it:

npm install @dlinardi/lotide

Require it:

const _ = require('@dlinardi/lotide');

Call it:

const results = _.tail([1, 2, 3]) // => [2, 3]

Documentation

The following functions are currently implemented:

• head(array):

  • returns the first element of the array.

• tail(array):

  • returns everything but the first element of array.

• middle(array):

  • returns the middle most element(s) of the given array.

• flatten(array):

  • returns a single level array from the array passed through containing nested arrays.

• findKey(object, callback):

  • returns the first key for which the callback returns a truthy value or if no key is found returns undefined.

• findKeyByValue(object, value):

  • returns the first key which contains the given value, if no key is found, returns undefined.

• letterPositions(string):

  • returns all the indices (zero-based positions) in the string where each character is found.

• map(array, callback):

  • returns a new array based on the results of the callback function.

• takeUntil(array, callback):

  • returns a piece of the array with elements taken from the beginning, keeps going until the callback returns a truthy value.

• without(sourceArray, itemsToRemoveArray):

  • returns a subset of a given array (sourceArray), removes unwanted elements (itemsToRemoveArray).

• countLetters(string):

  • returns an object with each key representing each character from the string, and the value being the amount of times that character exists in the string.

• countOnly(array, object):

  • returns an object that represents how many times each string is found in the input array.

• eqArrays(array1, array2):

  • returns true or false, based on a perfect match.

• eqObjects(object1, object2):

  • returns true or false, based on a perfect match.

• assertObjectsEqual(actual, expected):

  • compares two objects it takes in and prints out a message if they match or not.

• assertArraysEqual(actual, expected):

  • compares two arrays it takes in and prints out a message if they match or not.

• assertEqual(actual, expected):

  • compares two values it takes in and prints out a message if they match or not.